John Undrill



John Undrill is the architect of the PSS/E power system analysis software that has allowed power engineers to plan, design, and operate their systems safely and efficiently for decades, playing a key role in mitigating major power outages. PSS/E was a quantum leap in usability and detail compared to existing analytical software available at the time. It enabled static and dynamic analysis of generation and transmission systems and higher-voltage distribution systems. He also developed the Positive Sequence Load Flow (PSLF) software package, which models and calculates how power is transmitted from generation resources to points of end use. These packages have become industry standards. Undrill has also advanced techniques for testing stability of power plant components such as turbines and generators.

An IEEE Life Fellow, Undrill is the principal (retired) with John Undrill, LLC., Sedona, AZ, USA.